What a WASHLET needs: power, earth and distance from water
TOTO's European instruction manual sets clear conditions. The seat runs on 220–240 V AC, 50 Hz, and is a Class 1 appliance, so it must be plugged into an earthed socket. That socket should be protected by a residual current device (RCD) that trips at no more than 30 mA, and both the WASHLET and its socket should be at least 0.6 m from a bathtub or from the outside edge of a shower. TOTO asks for the seat to be installed close to a mains socket, warns against loose sockets and adapters, and tells you to follow the installation rules of the country you live in. In the Netherlands those rules build on the NEN 1010 standard; in Spain on the low-voltage regulation REBT and its bathroom instruction ITC-BT-27. Seats sold in Japan are made for 100 V and Japanese fittings, so we only install European models.
Dutch toilet rooms without a socket
In many Dutch homes the toilet sits in a small separate room, and because an ordinary toilet uses no electricity, that room often has a ceiling light and no socket circuit at all. Wall-hung toilets with a concealed cistern are also common, so the water supply and any new cable have to be routed neatly inside or along the wall. Adding a socket is routine work, but it is new wiring: our licensed electrician partner runs an earthed, RCD-protected circuit from the meter cupboard (meterkast) and places the socket where the WASHLET cable reaches it without an extension lead. With a wall-hung toilet we plan the cable together with the water branch, so tiles are opened once rather than twice. Where a suitable socket already exists and the bowl fits, a seat retrofit usually takes about half a day.
Spain: bidets, bathroom zones and where the socket can go
In Spanish homes the toilet is usually in the bathroom itself, often next to a bidet. The bathroom instruction ITC-BT-27 divides the space around a bath or shower into zones (volúmenes 0 to 3). General-purpose sockets are not allowed in zones 0 to 2, which extend 0.6 m beyond the bath or shower, while in zone 3 they are permitted when protected, for example by an RCD of 30 mA or less. That decides where a WASHLET socket can go. Because a WASHLET does the job of a bidet at the toilet itself, many clients have the bidet removed: its supply and drain are capped properly inside the wall or floor, and the freed space becomes storage or part of a Japanese washing area. New circuits in Spain are installed by a registered electrical company (empresa instaladora habilitada).
Will it fit your toilet? Bowls, wall-hung frames and the T-valve
For each WASHLET model, TOTO lists the TOTO bowls it is designed to combine with; the WASHLET RG Lite with side connections, for example, is presented as an easy retrofit for existing TOTO toilets. On other bowls, fit depends on the shape, length and fixing holes, so we check photos and measurements before anything is ordered. If your current bowl is not a good match, we replace it with a matching TOTO bowl, often a wall-hung model on a concealed frame, which also makes the floor easier to clean. The water side is straightforward: TOTO specifies a connection to the cold-water supply, using the new hose set supplied with the seat rather than an old one. In practice we fit a small T-valve with its own shut-off on the cistern supply. For models with hidden connections, water and power are prepared inside the wall.
Renting? Get the landlord's consent in writing
The seat itself can be removed and the original seat refitted, but a new socket or a branch in the water pipe is a change to the home. In the Netherlands, article 7:215 of the Civil Code lets tenants make only small changes that can be undone at little cost without permission. The government's guidance adds that a bathroom renovation needs the landlord's consent, that the landlord must reply within eight weeks, and that a refusal must rest on grounds such as the home becoming harder to let or losing value. In Spain, article 23 of the urban tenancies act (LAU) says a tenant may not carry out works that change the configuration of the home without the landlord's written consent; without it, the landlord can require the original state to be restored at the end of the lease. We help you describe the works and agree in writing what happens when you move out.
Apartments: VvE and comunidad rules
In an owner-occupied flat, the building association has a say whenever shared parts are involved. In the Netherlands, the deed of division and the VvE rules decide what needs approval: swapping the seat on your own toilet rarely touches shared parts, but moving the toilet or connecting to a shared drain stack usually does, and some buildings ask owners to report any work. In Spain, article 7.1 of the Ley de Propiedad Horizontal allows owners to alter the installations of their own flat as long as the building's safety, structure, exterior and the rights of other owners are not affected, and requires them to inform the comunidad's representative beforehand. In a building without heritage protection, a seat retrofit on the existing supply normally needs no municipal procedure. We check the rules for your building during the survey.
How long it takes and what it costs
Our indicative price for a WASHLET retrofit starts at €1,450 including VAT. That covers a TOTO WASHLET seat, installation and the T-valve in a standard situation; a new socket is extra where needed, as is a new bowl or a wall-hung frame. With a suitable socket in place, the work usually takes about half a day. When a socket has to be added or the bowl replaced, it takes longer and involves our licensed electrician partner. Because toilets, walls and wiring differ so much from home to home, the fastest route to a reliable answer is a few photos: the toilet from the side, the back of the bowl where the seat is fixed, the cistern supply and the nearest socket. A Japanese engineer reviews them free of charge, and after a site survey you receive a fixed quote.
